Bubble Injection System for Exhaust Agent Mixing
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Solution Overview
Problem
Existing emission abatement devices face inefficiencies in regenerating NOx traps and particulate filters, requiring power-intensive processes and supplemental air for effective agent injection and mixing in exhaust gas streams.
Innovation Solution
An apparatus with an injection system that vaporizes a portion of the agent into bubbles to inject the remaining liquid portion into the exhaust system, reducing power consumption and thermal lag, and promoting mixing without supplemental air, using a heater and controller to manage the injection process based on sensor data or time schemes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional liquid injection methods are used for agent delivery, then the injection process requires supplemental air for effective mixing, but this increases device complexity and power consumption
Solution Approach 1:
The patent changes the physical state parameter of the injection system by using phase change (liquid to vapor) of the agent to create bubbles, which naturally mix with exhaust gas without requiring supplemental air systems
Solution Approach 2:
The agent itself provides the mixing mechanism through its phase change process - the vaporizing agent creates bubbles that rise and mix with exhaust gas, making the system self-sufficient without external air supply
2Use of energy by moving object
If conventional liquid injection is used, then the system has higher power consumption, but vaporization-based injection reduces power consumption and thermal lag
Solution Approach 1:
The patent utilizes phase transition (vaporization) of the liquid agent to create bubbles, which provides injection force and mixing action without requiring high-power mechanical injection systems, thereby reducing power consumption and thermal lag
3Force
If liquid agent is injected without vaporization, then injection force is insufficient, but vaporizing a portion of the agent provides natural injection force through bubble generation
Solution Approach 1:
The patent vaporizes only a portion of the liquid agent to generate bubbles, which provides natural injection force through buoyancy and expansion, eliminating the need for high-pressure mechanical injection while using minimal energy
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces power consumption and thermal lag, enhances agent mixing and atomization, and allows for efficient delivery of regenerative agents to emission abatement devices, particularly during transient conditions, without the need for supplemental air, improving the regeneration of NOx traps and particulate filters.
Implementation Method 1
a heater is used to vaporize the first liquid portion into the at least one bubble
Implementation Method 2
vaporizing a first liquid portion of an agent into at least one bubble so as to inject a second liquid portion of the agent into the exhaust system by use of the at least one bubble
Data Source
AI summary
An apparatus comprises an exhaust system and an injection system. The injection system is configured to vaporize a first liquid portion of an agent into at least one bubble so as to inject a second liquid portion of the agent into the exhaust system by use of the at least one bubble for delivery of the agent to an emission abatement device of the exhaust system. An associated method is disclosed.